The Key,socket Head Screw, cataloged under National Stock Number 5120-00-178-0853, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5120-00-178-0853 |
| Item Name | Key,socket Head Screw |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Status | ACTIVE |
| Wrenching Surface Size | 0.313 INCHES NOMINAL SINGLE END IN |
| Style Designator | SCREWDRIVER HANDLE |
| Blade Length | 4.000 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | 8 TYPE AND A STYLE |
| Wrenching Surface Shape | HEXAGON SINGLE END EXTERNAL |
| Surface Treatment | OXIDE WRENCHING SURFACE |
| Material | PLASTIC HANDLE |
| Material | STEEL WRENCHING SURFACE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| GGG-K-275 | 4/1 Identification reference U.S. Government activity |
| GGG-K-275 TY8STA | 5/1 Secondary reference U.S. Government activity |
NSN 5120-00-178-0853 is a Key,socket Head Screw, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5120-00-927-3706. Verify interchangeability with system specifications before substitution.
Key specifications for 5120-00-178-0853: Wrenching Surface Size: 0.313 INCHES NOMINAL SINGLE END IN; Style Designator: SCREWDRIVER HANDLE; Overall Length: 7.875 INCHES NOMINAL IN; Blade Length: 4.000 INCHES NOMINAL IN. 8 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.